Regulator device



Jan. 3. 1933. J. BOGOPOLSKY REGULATOR DEVICE Filed Jan. 21. 1931 Patented den. 3, 19a.)

JACQUES BOGOPOLSKY, 0F GENEVE-ACACIAS, SWITZERLAND REGULATOR DEVICE Application filed January 21, 1931, Serial No,

lhe object of this invention is to provide an improved regulating apparatus especially adapted for use in connection with cinematographic apparatus operated by motor, and embodying a centrifugally operated member, a spring to restrain centrifugal movement of said member and means shiftable on the spring to vary the effective length thereof and thereby vary the degree of force with which the spring restrains the centrifugal movement of said member and hence modify the pressure thereof and the degree of friction created between the same and a brake drum or ot-ier revoluble element associated therewith.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of devices hereinafter described and claimed.

(hi the accompanying drawing, given by way of example, one form of embodiment of the invention has been shown, and on this drawing:

Fig. 1 is a plan view of the device, partially in section;

Fig. 2 is a transverse section of the same on the line AA of Fig. 1;

Fig. is a similar section on the line BB of Fig. 1.

The normal rate of taking pictures is 16 animated photographs per second, but this number may be varied from 1 to 128 for example and more, depending upon the work to be done.

The present invention has for its object the provision of an improved regulator which allows the speed of taking pictures to be varied automatically as may be desired by braking more or less the speed of the moving picture taking apparatus.

The braking-drum 1 contains a disk 2 keyed on the axis 8 of the regulator (Fig. 12). The circular plate 2 is provided with two centrifugally acting bral-zing blocks 4 each pivoted on an axis 5 fixed to said disk 2.

510,238, and in Switzerland January 21, 1930.

On each such pivot 5 is pivoted one end of a flat spring 6 the opposite end of which bears against the outer side of a stud 7 which projects laterally from one side of the free end of the braking block.

During the rotation, the block d is pressed outwards by centrifugal force and applies the fiber block 8 against the inner side of the drum 1.

The traverse 9 which is pivoted on the axis 3 of the regulator has bent extremities 9 which bear against the outer sides of the springs 6, in order to counterbalance the de vice. According to the location of the traverse 9, the active portion of the spring, indi cated by the dotted lines 10, is varied in length, as will be understood. The more the traverse 9 approaches the attaching points 5 of the springs, the more they become elastic and the more readily acts the brake.

T he index 11 solidly attached to the traverse 9 is displaced on a graduated scale 12 keyed on the axis of the regulator, which allows A in advance. The pinion 13 keyed on the axis 3 is connected to the mechanism of the apparatus by which it is operated. The traverse or adjusting member 9 has suflicient frictional contact with the parts on axis 3 located directly above and below it to maintain said member in the position in which it is set.

I claim:

1. A. centrifugally operated regulator device, comprising in combination with a brake drum an axle shaft therefor, a disc fixed to said shaft, a centrifugally acting member pivoted to said disc and forming a brake element for application to the drum, a spring tending to hold the brake element against centrifugal movement and a traverse engaging the outer side of the spring and movable longitudinally of the spring to vary the effective length thereof.

2. A regulating device as claimed in claim 1, in which the spring is attached at one end to the pivot of the brake element and the latter is provided with a stud at its free end against the outer side of which the free end of the spring bears, in which the traverse is pivotally mounted on the axle shaft, and including an element fixed to the shaft and having a scale cooperating with the traverse to indicate the adjusted position of the traverse. In testimony whereof I have hereunto set my-hand this sixth day of January A. D. 1931. JACQUES BOGOP'OLSKY. 

